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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of stock -based compensation expense in operations
Stock-Based Compensation expense related to continuing operations is included in Selling, General and Administrative expenses in the accompanying Consolidated Statements of Operations as follows (in millions):

 
For the Years Ended December 31,
 
2012
 
2011
 
2010
Compensation expense(1)
$
15.2

 
$
13.7

 
$
15.4


(1) Stock-Based Compensation expense is recorded in our Corporate and other business segment.
Schedule of information on performance share units
The following table provides information on our performance share units (dollars in millions, except weighted-average fair values of grants):

 
For the Years Ended December 31,
 
2012
 
2011
 
2010
Performance Share Units:
 
 
 
 
 
Compensation expense
$
5.7

 
$
1.7

 
$
4.1

Weighted-average fair value of grants, per share
$
48.64

 
$
31.78

 
$
44.85

Payout ratio for shares paid
52.5
%
 
—
%
 
127.7
%
Summary of status of undistributed performance share units
A summary of the status of our undistributed performance share units as of December 31, 2012, and changes during the year then ended, is presented below (in millions, except per share data):

 
Shares
 
Weighted- Average
Grant Date Fair Value
per Share
Undistributed performance share units:
 
 
 
Undistributed as of December 31, 2011
0.9

 
$
33.40

Granted
0.1

 
48.64

Adjustments to shares paid based on payout ratio
(0.1
)
 
26.58

Distributed
(0.1
)
 
25.73

Forfeited
(0.1
)
 
35.96

Undistributed as of December 31, 2012(1)
0.7

 
$
39.06


(1) Undistributed performance share units include approximately 0.5 million units with a weighted-average grant date fair value of $40.31 per share that had not yet vested and 0.2 million units that have vested but were not yet distributed.
Fair value of performance share units and tax deductions
The total fair value of performance share units distributed and the resulting tax deductions to realize tax benefits were as follows (in millions):
 
For the Years Ended December 31,
 
2012
 
2011
 
2010
Fair value of performance share units distributed
$
6.0

 
$
—

 
$
13.2

Realized tax benefits from tax deductions
2.3

 
—

 
5.0
Schedule of information on restricted stock units
The following table provides information on our restricted stock units (dollars in millions, except weighted-average fair value of grants):

 
For the Years Ended December 31,
 
2012
 
2011
 
2010
Restricted Stock Units:
 
 
 
 
 
Compensation expense
$
5.0

 
$
6.6

 
$
6.6

Weighted-average fair value of grants, per share
$
48.45

 
$
32.34

 
$
44.80
Summary of non vested restricted stock units
A summary of the status of our non-vested restricted stock units as of December 31, 2012 and changes during the year then ended is presented below (in millions, except per share data):

 
Shares
 
Weighted- Average
Grant Date Fair Value
per Share
Non-vested restricted stock units:
 
 
 
Non-vested as of December 31, 2011
0.6

 
$
36.51

Granted
0.2

 
48.45

Distributed
(0.2
)
 
35.16

Forfeited
(0.1
)
 
36.55

Non-vested as of December 31, 2012
0.5

 
$
40.50
Fair value of restricted stock units and tax deductions
The total fair value of restricted stock units vested and the resulting tax deductions to realize tax benefits were as follows (in millions):

 
For the Years Ended December 31,
 
2012
 
2011
 
2010
Fair value of restricted stock units vested
$
8.6

 
$
8.8

 
$
9.4

Realized tax benefits from tax deductions
3.3

 
3.4

 
3.6
Summary of stock appreciation rights
The following table provides information on our stock appreciation rights (dollars in millions, except weighted-average fair value of grants):

 
For the Years Ended December 31,
 
2012
 
2011
 
2010
Stock Appreciation Rights:
 
 
 
 
 
Compensation expense
$
4.5

 
$
5.4

 
$
4.7

Weighted-average fair value of grants, per share
14.34

 
9.39

 
13.75
Summary of stock appreciation rights activity
The fair value of each stock appreciation right granted in 2012, 2011 and 2010 is estimated on the date of grant using the following assumptions:

 
2012
 
2011
 
2010
Expected dividend yield
1.75
%
 
2.39
%
 
1.46
%
Risk-free interest rate
0.48
%
 
0.62
%
 
1.46
%
Expected volatility
40.42
%
 
41.94
%
 
39.93
%
Expected life (in years)
4.14

 
4.07

 
4.04


A summary of the status of our stock appreciation rights as of December 31, 2012, and changes during the year then ended, is presented below (in millions, except per share data):

 
Shares
 
Weighted-Average Exercise Price per Share
Stock appreciation rights:
 
 
 
Outstanding as of December 31, 2011
2.9

 
$
34.85

Granted
0.4

 
51.15

Exercised
(1.0
)
 
31.82

Forfeited
(0.1
)
 
37.81

Outstanding as of December 31, 2012
2.2

 
38.93

Exercisable as of December 31, 2012
1.3

 
$
35.75
Summary of stock appreciation rights outstanding
The following table summarizes information about stock appreciation rights outstanding as of December 31, 2012 (in millions, except per share data and years):

 
 
Stock Appreciation Rights Outstanding
 
Stock Appreciation Rights Exercisable
Range of Exercise Prices per Share
 
Weighted-Average Remaining Contractual Term (in years)
 
Aggregate Intrinsic Value
 
Weighted-Average Remaining Contractual Life (in years)
 
Aggregate Intrinsic Value
$28.24 - $51.40
 
4.8
 
$30.0
 
3.7
 
$21.3
The Schedule of total intrinsic value of stock appreciation rights exercised The total intrinsic value of stock appreciation rights exercised and the resulting tax deductions to realize tax benefits were as follows (in millions): For the Years Ended December 31, 2012 2011 2010Intrinsic value of stock appreciation rights exercised$14.4 $4.2 $10.1Realized tax benefits from tax deductions5.5 1.6 3.9